- Unconscious Incompetence
- Conscious Incompetence
- Conscious Competence
- Unconscious Competence
Another importance reason for getting to the fluency and automaticity of the unconscious competence stage of learning is retention. Not only is it easier to apply a skill which you have mastered to the point of not needing to consciously think through it, but you'll also retain that understanding longer.
When you really know something, it sticks with you for a long time. Cramming, on the other hand, might (probably not in physics!) get you to conscious competence, but that level of understanding isn't nearly as stable. At that point in the learning process, you know quite a bit and can do quite a bit, but you don't have the perspective to put all of the pieces together. It's not until you can do problems in multiple ways, explain where things come from, and what other phenomena they influence that you're really there.
I think that it's all of those connections that help you retain this level of mastery over a loner period of time. A strand here or there may break, but if everything's interconnected in your mental model, then there are more strands to help to hold it up, and you have a basis for reconstructing that lost knowledge for yourself.
If you've struggled to gain even a minimal level of competence (consciously incompetent), then your understanding is fragmented enough that it will be all be gone in a matter of a few days or weeks, and you'll be back where you started.
After all of the hard work that you put in to understand a subject, it's wasteful to let it slip away! If you're not mastering the material when the big assessment/test rolls around, it's crucial for you to address that right away, because the situation will only get worse.
The lower your level of understanding is, the faster it erodes.
Apart from concern for grades or concern for building later knowledge on a firmer foundation, it's vitally important to do some work to maintain or increase your understanding as a defensive measure against losing what knowledge you already have!